Clock for Learning Music Theory Improved Version: Circle of Fifths Clock, 3D Printed - Color: White - Shape: Circular - Uses: Learning music theory and a clock - Circle of Fifths Clock Whenever I see sheet music with a lot of flats or sharps, I make a clock out of the chart I need and stick it on the wall. The numbers 1-5 on the clock represent the number of sharps. D has 2 sharps, A has 3 sharps, E has 4 sharps, and B has 5 sharps. The flat keys are the mirror image, and you can count them to find the key! The design is an improved version. *It's very difficult to see the time!! (lol)* Thank you for looking.